GRC Hydro is a hydrology and water engineering firm based in Sydney, Australia. We offer specialist knowledge and expertise in the fields of hydrology, hydraulics and floodplain management. We work with government and private clients to fully understand their flooding issues and help them to plan, mitigate and manage them effectively. Our technical services consist primarily of floodplain management studies and flood impact assessments, while also including stormwater drainage and on-site detention design, hydrological studies for infrastructure, and post-event data collection.